06-09-2022, 10:31 PM
(06-09-2022, 06:19 PM)j3gq_imp Wrote: One word about the charts shown. When you look up from a given rpm, and figure that this exhaust gives you just another 5hp at that rpm, you might likely say “irrelevant”. But that’s not the most interesting way to look at the chart. When you look at the same chart along a line of constant power, from left to right, checking for example where 80 hp is produced, you find that the single exhaust system makes the same power at 1000 rpm/s less. That IS relevant, for noise, vibrations, comfort and your neighborhood. It also reduces internal friction, and such your gas consumption.
It's not clear to me that generating higher power at a given rpm necessarily equates to better fuel efficiency. Also not clear to me that I'd change my shift pattern based on the availability of the extra power for normal riding. You may be right...but it's not obvious to me. I agree that it's an interesting way to interpret the curves in any case.